package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RBloomFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate<String, Object> redisTemplate;

    @Autowired
    private RBloomFilter<String> bloomFilter;

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        String key="dish_"+categoryId.toString();
        List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);
        //缓存命中
        if(list!=null&&!list.isEmpty()) {
            log.info("redis cache hit:{}",key);
            return Result.success(list);
        }

        //缓存未命中
        // 查询BF
        boolean bfHit=bloomFilter.contains(key);
        if(bfHit){
            log.info("BF hit");
            return Result.success(null);
        }
        //BF未命中：查询数据库
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品
        list = dishService.listWithFlavor(dish);
        //list为空（mysql没命中）：更新BF
        if(list.isEmpty() ||list==null){
            bloomFilter.add(key);
            log.info("update BF");
            return Result.success(null);
        }
        //不为空（mysql命中）：更新Redis
        redisTemplate.opsForValue().set(key,list);

        return Result.success(list);
    }

}
